Fixture for a pool or spa



FIG. 1 is a front elevation view of a fixture for a pool or spa showing our new design;

FIG. 2 is a left side plan view thereof; and,

FIG. 3 is a front perspective view thereof.

The broken lines shown in dash, dash format in the drawings represent unclaimed portions of the design and form no part thereof.

The lines broken at random in the drawings represent contour lines or surface shading to show the character and contour of the design. 

The ornamental design for a fixture for a pool or spa, as shown and described. 